Full movie description "JAG Two Towns":

A smuggled IED in Iraq explodes inside a work tent and kills 17 Marines in a reserve unit from a small town in Oklahoma; one man survives; Harm and Bud go to the hometown and provide legal help to the families; the survivor returns home. The local Marine Corps Reserve Center burns due to arson; the sheriff suspects the returned hero; Harm and Bud investigate, then the hero-suspect goes on trial in his hometown; Harm and Bud prosecute, and they discover the truth. Meanwhile, Mac goes to Iraq and investigates the explosion; among the locals she learns the real story; she and the senior Marine officer watch a new democracy at work.